With the "To Hit a Home Run" prop bet you are betting on whether a player will hit a home run or not.
Official MLB (or applicable league) scoring is used (including any plays overturned by video review) and the leagues’ decisions are final.
For bets to have action the full 9 innings must be played (8½ if the home team is ahead), the player must have at least one at-bat and must start the game (ex: if a player is brought in to pinch hit, this will not count and bets will be void).
Also, if a player starts in a defensive position but is removed from the game before recording an at-bat, the bet will have no action.